The present invention describes an incubator system 1 comprisesingan outer framework (11) with multiple holes (14) into which incubator flasks (20) may be arranged in a vertical position;an inner space (30) being embedded by an insulating material (34), wherein the outer framework (11) is arranged outside the inner space (30); andan air cooling and heating unit (40) connected to a PTC element (50) positioned inside the inner space (30).

The present disclosure provides a perfusion culture device, wherein the perfusion culture device may comprise an incubator, a heat dissipation assembly and a plurality of power assemblies; the incubator may include a box body and an inner cavity surrounded by the box body, the plurality of power assemblies may be arranged in the inner cavity, the heat dissipation assembly may be fixed on the box body, and the plurality of power assemblies may be arranged on the heat dissipation assembly.

The invention relates to a process for reusing heat in a protein culture, the process comprising the steps of aerobically fermenting a material with an thermophilic organism to provide a thermophilic fermented culture; and performing a drying process on the thermophilic fermented culture using heat produced during the aerobic fermentation. The invention further relates to a system for reusing heat in a protein culture.